March 1943. The heroic code breakers at Bletchley Park face their worst nightmare when Nazi U Boats unexpectedly change their communication codes, placing an allied ship with 10,000 passengers in lethal danger. A classic espionage thriller from acclaimed Oscar Winning playwright Tom Stoppard, starring Oscar Winner Kate Winslet, Dougray Scott, Nikolaj Coster-Waldau and Tom Hollander.